It's an nfo file generator, using skeleton files you might already know. Fills all the fields you use/defined with your content, and can create a package of a dropped file containing sfv/rar/zip (external packer required) and the nfo.

If you don't know what skl files are for then you probably don't need this tool. Read the readme.nfo to learn how to use it, or ask around since some people already use it. and you might want to use a proper...